<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>珠峰培训零基础高薪就业班</title>
    <!-- IMPORT CSS -->
    <link rel="stylesheet" href="css/reset.min.css">
    <style>
        #outer,
        #inner {
            box-sizing: border-box;
            border: 10px solid #000;
        }

        #outer {
            position: absolute;
            top: 100.5px;
            left: 100px;
            z-index: 100;
            width: 200px;
            height: 200px;
            background: lightblue;
        }

        #inner {
            position: absolute;
            top: 50%;
            left: 50%;
            margin: -50px 0 0 -50px;
            width: 100px;
            height: 100px;
            background: lightcoral;
        }
    </style>
</head>

<body>
    <div id="outer">
        <div id="inner"></div>
    </div>

    <!-- IMPORT JS -->
    <script src="2.js"></script>
</body>

</html>